#include <bits/stdc++.h>
using namespace std;

string s;
set<string> sets;

void gets(string a, int left, int right) {
	if (left == right) {
		sets.insert(a+s[left]);
		return;
	}
	gets(a + s[left], left + 1, right);
	gets(a + s[right], left, right - 1);
	return;
}

int main() {
	cin >> s;
	gets("", 0, s.size() - 1);
	cout << sets.size() << endl;
	return 0;
}